FRITZ!Box 3272 Serwis - Baza wiedzy

Setting up automatic port sharing via UPnP

By default, the FRITZ!Box's firewall blocks all incoming connections from the Internet. If you enable the FRITZ!Box's UPnP function, then Internet applications (for example chat software, online games, file-sharing software) can automatically adjust the FRITZ!Box's security settings and set up the necessary port sharing settings by themselves.

Requirements / Restrictions

Important:The FRITZ!Box is not accessible from the Internet over IPv4 when used on a DS-Lite ("Dual-Stack Lite") connection. When DS-Lite is active, the status "IPv4 over DS Lite" is displayed under "Connections" on the "Overview" page of the FRITZ!Box user interface.

The Internet application must support the UPnP (Universal Plug and Play) standard.

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS.

Enable the option "All devices in the home network are allowed to change their own port sharing".

Click "Apply" to save your settings.

2 Configuring an Internet application to use UPnP

Configure the Internet application so that it uses UPnP.

Note:You can find information on the configuration in the manual, or consult the manufacturer directly.

3 Configuring the computer's firewall

If the Internet application is installed on a computer with its own firewall (for example Windows firewall), you must also configure the firewall:

Important:If changing the security settings of your FRITZ!Box via UPnP is allowed, malicious software can also cause ports to be shared, thus bypassing the FRITZ!Box's firewall. You should therefore set up a firewall on all computers in the home network for security reasons.

Configure the computer's firewall so that the server service or Internet application can be accessed from the FRITZ!Box home network.

Note:You can find information on configuring the firewall in its manual, or consult its manufacturer directly.

Now UPnP-capable Internet applications automatically open the required ports in the FRITZ!Box.

You can find a current overview of ports automatically enabled for port sharing in the FRITZ!Box user interface under "Internet > Permit Access > Port Sharing" in the section "List of Shared Ports". You can click the (Delete) button to manually close individual ports.